{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-56604", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T14:03:06.012Z", "datePublished": "2024-12-27T14:51:09.618Z", "dateUpdated": "2026-08-05T11:45:24.947Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:45:24.947Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: RFCOMM: avoid leaving dangling sk pointer in rfcomm_sock_alloc()\n\nbt_sock_alloc() attaches allocated sk object to the provided sock object.\nIf rfcomm_dlc_alloc() fails, we release the sk object, but leave the\ndangling pointer in the sock object, which may cause use-after-free.\n\nFix this by swapping calls to bt_sock_alloc() and rfcomm_dlc_alloc()." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The dangling `sock->sk` can only be created through `rfcomm_sock_create()`, i.e. a local `socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM)` syscall; the remote-peer path `rfcomm_connect_ind()` passes `sock == NULL` and therefore never binds a sk to a socket. Exploitation thus requires local execution rather than Bluetooth-range access.\nAC:L - The attacker controls both sides of the condition — they can drive the system into memory pressure with their own allocations (GFP_ATOMIC allocations fail readily under pressure) while looping on RFCOMM socket creation until the `rfcomm_dlc_alloc()` kzalloc fails. No memory layout or victim state outside the attacker's influence is required.\nPR:L - `bt_sock_create()` performs no capability check for BTPROTO_RFCOMM and even autoloads the rfcomm module on demand, so any unprivileged local user can reach `rfcomm_sock_alloc()` without Bluetooth hardware or CAP_NET_ADMIN/CAP_NET_RAW.\nUI:N - The attacker triggers the entire sequence from their own process via the socket() syscall; no action by any other user is needed.\nS:U - The freed `struct sock` and the stale pointer both live in kernel memory within the same security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - A freed `struct sock` (rfcomm_pinfo slab object) remains referenced by the socket, and a use-after-free on that object lets an attacker reclaim the slot with controlled data and read back kernel memory, so per UAF scoring guidance confidentiality impact is High.\nI:H - Use-after-free on a `struct sock` gives heap-spray and write primitives over function-pointer-bearing fields (sk_destruct, sk_data_ready, sk_state_change are all set in this very function), which is leverageable for control-flow hijack, so integrity impact is High.\nA:H - Dereferencing the dangling `sk` pointer results in slab corruption and a kernel oops/panic, which is a full denial of service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/rfcomm/sock.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ac3eaac4cf142a15fe67be747a682b1416efeb6e", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6021ccc2471b7b95e29b7cfc7938e042bf56e281", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "32df687e129ef0f9afcbcc914f7c32deb28fd481", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "3945c799f12b8d1f49a3b48369ca494d981ac465", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/rfcomm/sock.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.120", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.66", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.5", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.66" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/ac3eaac4cf142a15fe67be747a682b1416efeb6e" }, { "url": "https://git.kernel.org/stable/c/6021ccc2471b7b95e29b7cfc7938e042bf56e281" }, { "url": "https://git.kernel.org/stable/c/32df687e129ef0f9afcbcc914f7c32deb28fd481" }, { "url": "https://git.kernel.org/stable/c/3945c799f12b8d1f49a3b48369ca494d981ac465" } ], "title": "Bluetooth: RFCOMM: avoid leaving dangling sk pointer in rfcomm_sock_alloc()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-56604", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-11T15:42:12.765631Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-11T15:45:23.368Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:50:48.128Z" } } ] } }